All greenhouses must be attached to a base or foundation. An optional galvanized steel base is available for all our greenhouse models. Another option is to use standard 6" x 6" landscape timbers as a foundation, which you may also want to anchor. Loose gravel, wood chips, brick or the bare ground are all nice flooring options for your greenhouse.
Free Shipping Anywhere in the Continental United States! Shipments to Alaska or Hawaii qualify for free shipping to any West Coast port.
Galvanized steel base is available for all our Riga greenhouse models.
You can enjoy greater height in your Riga greenhouse by putting it on a 20" knee-wall and using this door extension kit to complete the house.
Allows you to put your Riga greenhouse on a knee-wall Raise your Riga greenhouse 20 inches Fits all Riga greenhouses; not compatible with the Riga base kit
Window opens and closes according to indoor temperature. Increase the natural ventilation 40" wide x 24" deep Automatic solar window opener included.
Aid the opening of the greenhouse doors 6"H x 9'8"W x 10'6"L Raises the greenhouse height for more growing and head room. Help secure greenhouse to ground.
1 Kit for each side of greenhouse Riga III Shelf Kit #1 Top shelving twin-wall polycarbonate: 14†deep; Suspended shelving with polycarbonate inserts (for more light): Regular height shelving twin-wall polycarbonate: 25†deep; Suspended shelving with out braces, allows for larger equipment to be stored underneath
1 Kit for each side of greenhouse Riga III Shelf Kit #2 Top shelving twin-wall polycarbonate: 14†deep; Suspended shelving with polycarbonate inserts (for more light): Regular height shelving Inserts (flat), or heavy duty seed trays – to make starting seeds and transplanting easier.: 25†deep; Suspended shelving with out braces, allows for larger equipment to be stored underneath
Aid the opening of the greenhouse doors 6"H x 7'8"W x 10'6"L Raises the greenhouse height for more growing and head room. Help secure greenhouse to ground.
1 Kit for each side of greenhouse Riga IIIs Shelf Kit #1 Top shelving twin-wall polycarbonate: 14†deep; Suspended shelving with polycarbonate inserts (for more light): Regular height shelving twin-wall polycarbonate: 25†deep; Suspended shelving with out braces, allows for larger equipment to be stored underneath
1 Kit for each side of greenhouse Riga IIIs Shelf Kit #2 Top shelving twin-wall polycarbonate: 14†deep; Suspended shelving with polycarbonate inserts (for more light): Regular height shelving Inserts (flat), or heavy duty seed trays – to make starting seeds and transplanting easier.: 25†deep; Suspended shelving with out braces, allows for larger equipment to be stored underneath
Aid the opening of the greenhouse doors 6"H x 7'8"W x 7'L Raises the greenhouse height for more growing and head room. Help secure greenhouse to ground.
1 Kit for each side of greenhouse Riga IIs Shelf Kit #1 Top shelving twin-wall polycarbonate: 14†deep; Suspended shelving with polycarbonate inserts (for more light): Regular height shelving twin-wall polycarbonate: 25†deep; Suspended shelving with out braces, allows for larger equipment to be stored underneath
1 Kit for each side of greenhouse Riga IIs Shelf Kit #2 Top shelving twin-wall polycarbonate: 14†deep; Suspended shelving with polycarbonate inserts (for more light): Regular height shelving Inserts (flat), or heavy duty seed trays – to make starting seeds and transplanting easier.: 25†deep; Suspended shelving with out braces, allows for larger equipment to be stored underneath
Aid the opening of the greenhouse doors 6"H x 9'8"W x 14'L Raises the greenhouse height for more growing and head room. Help secure greenhouse to ground.
1 Kit for each side of greenhouse Riga IV Shelf Kit #1 Top shelving twin-wall polycarbonate: 14†deep; Suspended shelving with polycarbonate inserts (for more light): Regular height shelving twin-wall polycarbonate: 25†deep; Suspended shelving with out braces, allows for larger equipment to be stored underneath
1 Kit for each side of greenhouse Riga IV Shelf Kit #2 Top shelving twin-wall polycarbonate: 14†deep; Suspended shelving with polycarbonate inserts (for more light): Regular height shelving Inserts (flat), or heavy duty seed trays – to make starting seeds and transplanting easier.: 25†deep; Suspended shelving with out braces, allows for larger equipment to be stored underneath
Aid the opening of the greenhouse doors 6"H x 7'8"W x 14'L Raises the greenhouse height for more growing and head room. Help secure greenhouse to ground.
1 Kit for each side of greenhouse Riga IVs Shelf Kit #1 Top shelving twin-wall polycarbonate: 14†deep; Suspended shelving with polycarbonate inserts (for more light): Regular height shelving twin-wall polycarbonate: 25†deep; Suspended shelving with out braces, allows for larger equipment to be stored underneath
1 Kit for each side of greenhouse Riga IVs Shelf Kit #2 Top shelving twin-wall polycarbonate: 14†deep; Suspended shelving with polycarbonate inserts (for more light): Regular height shelving Inserts (flat), or heavy duty seed trays – to make starting seeds and transplanting easier.: 25†deep; Suspended shelving with out braces, allows for larger equipment to be stored underneath
Aid the opening of the greenhouse doors 6"H x 9'8"W x 14'L Raises the greenhouse height for more growing and head room. Help secure greenhouse to ground.
1 Kit for each side of greenhouse Riga V Shelf Kit #1 Top shelving twin-wall polycarbonate: 14†deep; Suspended shelving with polycarbonate inserts (for more light) Regular height shelving twin-wall polycarbonate: 25†deep; Suspended shelving with out braces, allows for larger equipment to be stored underneath